The Oswald Maximum Security Prison has opened an experimental new ward reserved for especially dangerous criminals. This unit, Emerald City, focuses on rehabilitation, but the world inside is even more corrupt and violent than the mean streets where these inmates come from. Inside the walls there are also two sets of rules, those laid down by the warden and those understood by the racially divided prisoners.

This HBO series, full of gritty and violent imagery, deftly handles some sensitive issues of the American justice system. This collection gathers together the first six seasons of the show, which has proved to be one of the most popular and long-running dramas in HBO's history